The 10 Biggest Data Breaches of 2014 (So Far)

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Neiman Marcus said in January that as many as 1.1 million credit cards could have been compromised by surreptitiously installed software from mid-July to late October, the company last month revised that number to about 350,000 potentially affected cards. About 9,200 of those stolen credit cards were used fraudulently, according to a Neiman Marcus spokesperson.

The company said it conducted a vulnerability assessment of its payment card systems and reviewed its intrusion detection systems and firewalls. In addition to further hardening its systems and adding new security tools, Neiman Marcus also modified its software and security credentials.